So you screwed up a block..

Don't overly fret as long as you have direct access to your database. While I thought it may be overly complicated, fixing some bad code within a block can be easily rectified. Simply log into your database with an authorized account. There will be blocks and custom block tables. If you created your own block you should find it under custom_blocks. Find your block in that table and you can directly edit your php or script code. If you modified an existing block then look under the blocks table. ezpz