After installing PSS 757 v1.3, another window opens and says "Increase FPS fixer for PSS 757 v1.3" and says locate the dsd_xml_tcas.dll and dsd_xml_tcas.ini and I have specified my FS9 folder, but it has [error 7:Fix did not finnish correctly. Please check your path and try again!] I remember. Are these in the modules folder as the "help" button says or what because I searched in the modules folder and these 2 files are not in there

If those files aren't in your modules folder then there's no need to worry. They are installed by some other payware addons, but if they're not there then they can't cause framerate problems!