Well The Simpsons: Hit & Run is a fun game that I enjoyed. It has 7 slots to save the game. It has total 7 levels. I saved levels in each slots. But sometimes mistakenly some slots are overwrite. But now the game is 100% complete you can select any level and any mission within it.
Following missions unlocked
Level 1
1. S-M-R-T
2. Petty Theft Homer
3. Office Spaced
4. Blind Big Brother
5. Flowers By Irene
6. Bonestorm Storm
7. The Fat And Furious
Level 2
1. Detention Deficit Disorder
2. Weapons Of Mass Delinquency
3. Vox Nerduli
4. Bart 'N' Frink
5. Better Than Beef
6. Monkey See Monkey D'oh
7. Cell-Outs
Level 3
1. Nerd Race Queen
2. Clueless
3. Bonfire Of The Manatees
4. Operation Hellfish
5. Slithery Sleuthing
6. Fishy Deals
7. The Old Pirate And The Sea
Level 4
1. For A Few Donuts More
2. Redneck Roundup
3. Ketchup Logic
4. Return Of The Nearly-Dead
5. Wolves Stole My Pills
6. Cola Wars
7. From Outer Space
Level 5
1. Incriminating Caffeine
2. ... and Baby Makes 8
3. Eight is Too Much
4. This Little Piggy
5. Never Trust a Snake
6. Kwik Cash
7. Curious Curator
Level 6
1. Going to the Lu
2. Getting Down with the Clown
3. Lab Coat Caper
4. Duff for Me. Duff for You
5. Full Metal Jackass
6. Set To Kill
7. Kang and Kodos Strike Back
Level 7
1. Rigor Motors
2. Long Black Probes
3. Pocket Protector
4. There's Something About Monty
5. Alein 'Auto' topsy Part I
6. Alien 'Auto' topsy Part II
7. Alien 'Auto' topsy Part III
+ Bonus Missions

Save game files
DOWNLOAD
pass - http://colorsfromindia.blogspot.com/

How To Use These Files:
First backup your save game files from the folder where you installed the game. It could be
C:Simpsons - Hit & Run
C:Program FilesSimpsons - Hit & Run
Then Copy and Paste Save# unzipped files to it.