Bootcamp For Mac Pro 1 1
I understand you have a 32 bit EFI. I do not think this has anything to do with the BIOS. Since you have already installed 64 bit Windows 7, I am guessing it does not. In your comments, you say you modified the CD. So I can assume you have a working DVD drive.
When you say you modified,. Apple does not officially support 64 bit Windows on your model Mac.
Boot Camp on a Mac Pro 1,1 Some of Apple’s earlier hardware has weird Boot Camp support, primarily with 64-bit Windows. Even though the actual hardware itself is capable of running Windows x64, Apple wouldn’t support it.
Well, I have a 2007 iMac, which Apple does not officially support 64 bit Windows, yet I have run 64 bit Windows 7 and I am currently running 64 bit Windows 10. I assume the Windows 7 installation DVD has Windows 7 Service Pack 1 (SP1) or later included.
This is a requirement according to the Apple website. You have to installed Windows for a BIOS boot. It not a question of whether you can install to use a EFI boot, but rather the restriction is in the drivers. The Boot Camp Support Software for your Mac assumes you are using a BIOS boot method. This software includes the drivers for your Mac. You can download the Boot Camp Support Software for your Mac from the website. Since you have a 64 bit install, you might have trouble installing this download.
If so, refer to the website. Finally, you might not be blessed. If not, then your Mac would be slow to boot.
The instruction assume you have already installed the Boot Camp Support Software. Note: Many people have assumed the latest release the the Boot Camp Support Software should always be used. Windows command linecmd for mac. This is completely wrong.
You have to use the Boot Camp Support Software released for your model Mac. Windows is designed to accept older drivers and even 32 bit drivers when the current driver is not available. So, if you decide to install 64 bit Windows 10 on your Mac, you would still use the same Boot Camp Support Software as for a 32 bit Windows 7 install.
Supported Systems Name Description Revision Number File Size Release Date Download Link • iMac with Retina (2014-2017) • MacBook Pro (2015 – 2017) • Mac Pro (2013) Boot Camp Unified Driver for Windows 10 • Display Driver • AMD Radeon Settings 18.10 530 MB • iMac Pro (2017) Boot Camp iMac Pro Driver (Win10) Driver Display driver to support iMac Pro (2017) on Apple Boot Camp. Supported GPUs: • AMD Radeon Pro Vega 56/64 17.50 400 MB 9/11/2018 • iMac with Retina (2014-2017) • MacBook Pro (2015 – 2017) • Mac Pro (2013) Boot Camp Windows 10 Driver • Display Driver • Catalyst Control Center 17.10 604 MB 11/7/2017 • iMac (2007-2012) • MacBook Pro (2011) • Mac Pro (2007-2010) Boot Camp Windows 7/8.1/10 Driver • Display Driver • Catalyst Control Center 15.201 294 MB 9/21/2015 *By clicking the 'Download' button, you are confirming that you have read and agree to be bound by the End User License Agreement.
Once the formatting process is finished, you should be able to transfer files to the newly formatted flash drive. Understanding File Systems Mac OS X and Windows support different file systems. It was developed by Apple and first introduced in 1998 as an improved version of HFS, supporting much larger files and using the Unicode encoding. 
Depending on the size and speed of your flash drive, it may take a minute or two. The main file system of Mac OS X is HFS Plus.
Your download will begin immediately after clicking on the 'Download' button. If you do not agree to these terms and conditions, you do not have a license or permission to use and/or download the software.