You must be having a bad day .. I actually spent all of 10 minutes researching to come up with that question I posed to you and like you said there is very little written on it. So either answer the question or don't but don't insinuate I am posting something just to be posting. I give you a pass today Hope you find what your looking for.
I asked for Windows XP SP1 CD ONLY, and made it clear what volume label is = XRMSP1_EN Stated I was NOT after SP1a, SP2 or SP3. So you post a link for boot floppies AND links for SP1a, SP2 and SP3. I didn't ask what is the difference is between SP1 and SP1a, I asked for the ISO for SP1.
I have the German release of the CD (XRMSP1_DE), but that language is probably not what you're looking for. The included xpsp1.exe is MD5 022430226CB9547104B0148990AB1359 / SHA-1 9D350D317D962D59EB1BFE21B2128AFDDADBD921.
I've have this cd image: XRMSP1_EN (304,740,352 bytes) md4: 5D96C6E6B28C92B130787E069AFC85DF. md5: ACF2E238DA694B71D711DC570DA24F2B sha1: CA5FBD61BAB337815343B7D52C39DC2796BD51B8 Timestamp is: 2002-08-29-15:00 Maybe it helps.
I think that is it 304740352 bytes = 290.623 megabytes. I just spent the better part of 2 hours looking for it (after seeing your post) and all I found was this. Code: XRMSP1_EN.iso Windows XP Professional Service Pack 1 English X09-11757 End Item Part No. E85-01891 October 2002 I would like to get that from you as well, if possible.