Currently all testcases and teststeps are stored in one large project file. When working with a team, collaboration is a pain, because this makes it impossible for several persons to work on one project. Merging this project file is nearly impossible, so collaboration on SoapUI projects is impossible.
I suggest to create subdirectories per testcase and files per teststep, similar to java package and java classes. This makes collaboration on SoapUI projectsn possible using a version control system.
All references to file must be relative.