Well, Internet Archive version of LFRS site says I've done 1:13.431 in Interlagos back in 2003 and a 1:33.567 in Suzuka back in 2002.
It's not with the original carset but LFRS sets did use the same configuration, just changed names, graphics and cc performance. So I believe the laps can count.
I usually don't play with original tracks or the original carset (there's no point on doing it for me, as we have all these nice tracks and carsets on
http://www.grandprix2.de). But I may have a try someday to see if I can match your laptimes
If you want some competition, there are Formula GP2 and GP2 Cup (we still don't know when the new GP2Cup season will start). Both in
http://www.f1mania.net/forum but the forum is on portuguese (brazilian forum).