There is now a fantastic recreation of the famous Targa Florio available for GTL. Get the download here
http://www.nogripracing.com/details.php?filenr=33750If your not sure what the Targa Florio is, just google it.
Track loading times vary and some folk are having trouble getting it to load/run. You probably need a fairly high spec PC and a minimum of 3GB RAM is required, although some have reported running it on less RAM.
If you have completed a lap please use this thread to report your laptimes and what car you used.
Also post if your having trouble running it. There is a patch that can help. It tells GTL.EXE that your PC has more RAM available if required. Get the patch here
http://www.gamefront.com/files/20792696/4gb_patch_exe. Just run the patch and point it at your GTL.EXE file. The patch does the rest.
Looking forward to reading your lap times