You have 3 options as far as I know
1- Put all your files/project on a network computer that all computer will work from. So all computer will see for exemple //server/projects/
2-Use the exact files structure on every computer. Assuming you you work on a mac, put youre files in lets say "Volume/documents/. Then, re configure Shake to NOT use UNC path. So instead of using Computer/user/volumes/ducuments, shake will skip the cumputer/user part.
3- Use relative path in your script
Let me know if you need more help