Installation and Configuration Help

The website for which I am a college sports photographer decided to move its webhosting to a popular superbowl advertiser. The gallery portion of the site was setup by me without much trouble on version 2.1.2 of gallery a few years ago.

After having spent several hours trying unsuccessfully to authenticate (including scouring the forums) I have decided to give up!! There must be other online galleries out there that it is actually possible to install.

Issue is the following.

This the URL for the web gallery...

http://www.2wheelracing.com/HTML/pics.html

I have gone through the authentication but now upon the system check, I am geting a falied message error...See below

System Checks

PHP Version Success
FILE Directive Success
Safe Mode Success
exec() allowed Success
set_time_limit() allowed Success

I am planning to setup a photo gallery for the family.
I am just planning the install and have noticed I have a 100mb MySQL size limit, so I am wondering if the images are stored inside the MySQL database or just links to the pictures. If they are stored in the database then I will not be able to upload many pictures of reasonable resolution.

I got an installation error when installing Gallery2
The error message is:
Fatal error: Call to undefined method WelcomeStep::setIsLastStep() in /home/site/public_html/gallery2/install/index.php on line 129

What is the problem with this issue. How can i solve this ?
Thanks for help

[=9]
Gallery version: 2.3 Full
PHP version: 5.2.9

I've twice installed Gallery2, both stopped showing main.php within a few hours with all white space and no matrix template modifications.
Hosting provider claims to be running PHP 5.2.9 Is there anything I can do to get a gallery 2 install.
Here is Galleries output.
Get system details; useful for copy/paste into G2 support forum.
Last Run Details: