Theme development

I was working on my site trying to add another block region to it. When I got an error.... header already submitted or something. Anyway it didn't work right so I changed it back....but when I did none of the blocks appear now and I can't even log in because the navigation block isn't right. How would I edit the blocks without having to log in because when I try to go to ..../?g=admin I don't have access because I deleted my history and stuff because I thought that might be the problem.
HELPPPPPP!!!!!!!
If I can't log in my site is lost.

I am struggeling to get my secondary links to appear in a block.
It works fine in page.tpl.php;

hey guys

im looking for a snippet that i can paste into my page.tpl.php file that will automaticly display the last 5-10 recent blog posts

and im not sure if it can be done but i am not using blocks i just wanted to set up my page using css and just add the snippet between my div tags kind of like this

Hello,

I'll admit, I did add quite a few to test out different styles - the trouble is, now I am only being shown six themes. I do have the 'meta' theme installed, and several other themes, but cannot fathom out why I can only see some of them on my admin screen. This is a new problem that did not occur before. The trouble is, I have been making so many changes to my site, i could not tell you when they started disappearing.

So, my question(s). Is there a default number for the drupal to show of themes, and if so, how do I override this?

Hit my next problem; hope someone out there can point me in the direction since I'm fairly sure this one is easier than the last.

I've overwritten my CCK created node template (node-content-car.tpl.php) so that I can completely control the format rather than output $content. My first problem is I want to output thumbnails (I'm using upload_image module) with links to the full image node and I can't for the life of me get it to work. I thought the code below would do the trick.

One thing that has been bugging me for months is the fact that a lot of administration tables break the layout of a website. One that was especially annoying was the Access Control table. Because of the way it shows checkboxes and list roles it was irritating. I came up with a solution in Drupal 4.6 but 4.7 escaped me for months until now.

So since I talked up the channel nine theme I had to come up with a solution for this problem. Since doing this was not straight forward I am posting a link to a tutorial.