I'm not a programmer either a network or database expert.
But after installed 3~5 website with XOOPS I found some possible solutions for the blank page problem:
0.1 The web hosting is not stable during the installation or they did something to your www.XXXXXX.com/~YYYYYY link and causing the page couldn't b shown.
0.2 Must immediately log in as webmaster after the installation and install all the modules and set the group permission as well.
And Please Do Not change the Weight of the the modules because it will cause the blank page problem. This will happed if u just change weight of just one module. (The developer team please test and check this problem.)
0.3 Please keep ur FTP log in ur website while u using browser log in as webmaster for the 1st time and change the chod using the FTP and refresh/relaod the page with the browser and see whether it has been chenged. Sometimes the server won't let u change chod in FTP mode then u have to use C-Panel or Plesk to do it.
0.4 Make sure u install every thing and set up everything b4 ur log out as webmaster for the 1st time.
Hope these will help.
=|= QingTing