Under Development - GTA Theme (Need Support)

[MyBB Themes]

Assume that only 20% of actual design has been done.

Looking to CSS3 Properties onto it.

LIVE DEMO : CLICK HERE

QUESTIONS:

How do i stretch the background image and with full clarity ?
(I tried background-size property , stretch property , repeat-x , NOTHING WORKED)

Anyone know how to remove padding between THEAD and TCAT ?
(They are having small space making theme look dirty)