Step4 G2.2.5 to 2.3 terminates prematurely

G2 is not running, it's in that in between state of a preinstall where I've restored the ZIP, but can't get through the upgrade utility.

Gallery version: 2.2.5 (Core Module version 1.2.0.7)
PHP version: 5.2.4
PHPInfo Link: See attached graciouscall-org_phpinfo.pdf
Webserver (e.g. Apache 1.3.33): Apache - not sure what version, but I think it's 2.0.x
Database (e.g. MySql 5.0.32): 5.0.45
Activated toolkits (e.g. NetPbm, GD): Let me know if you need more than the phpinfo
Operating system (e.g. Linux): Linux
Browser (e.g. Firefox 2.0): Multiple IE 6, FF 3.0

I'm in the process of upgrading
from 2.2.5 (Core 1.2.0.7)
to 2.3 (Core 1.3.0).

I have only one modified file upgrade/index.php in which I place the following lines to try to fix this problem:

@ini_set('max-execution-time', 900);
@ini_set('default_socket_timeout', 600);
@ini_set('mysql.connect_timeout', 120);

I keep getting browser control back on Step 4. Upgrade Core prior to completion.
It's like my hosting company has over-zealous timeouts.
Is there an easy way to break this out into sub-steps or to run the functions manually instead of as a long running transaction?

I'm attaching the upgrade log in a zip file.

Awaiting His Shout,
Doug Peloquin
Romans 8:28-39