Expect around 17.5 hours for 100% completion, or about a week if playing ~1.5 hours daily.
I can provide specific troubleshooting if you tell me what happens when you try to open the file. Wheelman - Xbox 360 : Video Games - Amazon.com Wheelman.part1.rar
Utilise the "Wheelman" driving mechanics (fast-paced car combat). Expect around 17
To make sure you get the best guide for your installation, let me know: Are you getting a specific when extracting? Do you have all the other parts (part2, part3, etc.)? Wheelman.part1.rar
Use software like WinRAR or 7-Zip to extract contents from Wheelman.part1.rar (this usually requires all partX.rar files in the same folder).