For 7th Street, go to setup.ini, find dividetexturesize and set it to 4.
As for Prison, I don't know what the issue is but on my laptop FPSC games have a weird resolution issue that can be fixed by right clicking it, going to Properties > Compatibility, check off Disable full-screen optimisations, then click Change high DPI settings and under "High DPI scaling override" check off the box and select Application from the drop-down menu, then click OK and Apply. But like I said, I don't know if that's the issue