can someone please tell me, how can i play metal slug with red blood ?
Ok what you want to do here is click down on the R3 button (right analog stick) once you have Metal Slug (or any other game) running. You'll now be in Test mode. Scroll down to "Setting up the soft dip" and hit X. Now go to "Slot 1 Metal Slug" and hit X.
Here you'll see a bunch of options including how many heroes you get (up to 99) and blood. Just set blood to "On" by hitting X and you are good to go. To get back to the game, hit  square twice then scroll down to Exit and hit X.
Remember, you can do this for many games, not just Metal Slug.
Yea, apparently v1.0 was the release version number and r386 is the SVN test revision number... when they have a non-test (buggy) update they will likely restart with the normal numbering I imagine. Reminds me of when MAME went to .100 and confused a lot of people.
On certain games (Street Fighter Alpha 2 and Alpha 3 are the only one's I've tested so far that have this problem) I'm unable to get button mapping to work, for example the Down/Up/Left/Right dpad can only be mapped for player 1 (meaning if you modify it, you don't get the option to map those directions on either controller), and player 2 can't have R2 mapped (if I try to map it, it says circle is mapped, and if I try other buttons, it shows a hex code of 0x40*, * meaning a random number.)