Under the directory "..\Cypress Suite USB\Driver\bin",the drivers are classified as \w2k\x86, \wxp\x86, \wxp\x64, \wlh\x86, \wlh\x64, \win7\x86, \win7\x64...... The SYS files in these categories seem to be different. It is laborious to make a INF file, CAT file and then sign the driver for each category. So, is it possible to simply classify the driver as either 32-bit and 64 bit? If yes, then which two SYS files should I use for these two categories? Thanks in advance.
No. It is not recommended to classify them as 32-bit and 64-bit drivers.
There are few differences from one OS to other. I understand your point regarding the time needed for certifications, but it is recommended to keep them separate.