Based on your query for a (English) "FaxCool" ISO that is portable , I believe you might be referring to a custom or modified build (often named "Cool" or "Lite" by enthusiasts). However, since no official "FaxCool" release exists, I'll highlight an interesting feature commonly found in portable or modular Windows 7 SP1 ISOs:
The FaxCool build was known for several specific technical modifications: Dual-Architecture: It often included both x86 (32-bit) x64 (64-bit) versions in a single image. Pre-Activated: win7 sp1 32 64 en faxcool iso portable
Can be easily loaded onto a small USB stick for diagnostic use. Low RAM Usage: Ideal for PCs with 1GB or 2GB of RAM. Old Hardware: Reviving laptops from the 2005–2010 era. Based on your query for a (English) "FaxCool"