The script won't let you go further if you have register globals set to 'on' in your php. Does this need to be a show stopper? There are other vhosts running that need it on. Any application that will run with it off will run with it on will it not ?
we have developed using this option, and we give no warranty about right behaviour of TL is this condition is not full filled.
You can modify our install procedure to install anyway.
Warning: we will not consider any issue reporting for installation with register globals ON