[Installer] won't install?

Okay, so I'm new to this whole modding thing. Pretty much I'm doing it at first 'cuz I'm switching to T-Mobile, but also because I would like to be able to do more with my phone.

Anyways, after researching and reading and such, I've pretty much come to the conclusion that I can't get SummerBoard unless I install it using Installer.app. The problem is, when attempting to install Installer.app, on my iPhone it tells me "Failed, aborting in 10 seconds" whenever it gets to that part.

I am running version 1.1.4 on an 8 GB model.

Anyone able to help me out?

*EDIT* I should make note, I'm using iLiberty+ to do all of this as well.

Well, i got it to install using Cydia. I just searched for Installer through Cydia, and it installed just fine, but wouldn't install using iLiberty+.

Weird....

Anyways, if anyone else needs this information, that's why I explained how I figured it out.