Scenario is: I have a user task form, which has a search button. On click of whi

You can do it as follows.
Step 1. User search screen. This will show the search options and section to show the selected search result record (initially all blank). If you want, you can hide this by putting this in a section
Step 2 - This will show the search result. You will have a script task inbetween doing the search bit.
Step 3 - Once user selects the desired record from the previous step, Select the info of the selected record and populate the form from STEP 1.
Step 4 - Activity chain all these forms. Once done, they will appear as a seamless flow of events.

You can do it as follows.
Step 1. User search screen. This will show the search options and section to show the selected search result record (initially all blank). If you want, you can hide this by putting this in a section
Step 2 - This will show the search result. You will have a script task inbetween doing the search bit.
Step 3 - Once user selects the desired record from the previous step, Select the info of the selected record and populate the form from STEP 1.
Step 4 - Activity chain all these forms. Once done, they will appear as a seamless flow of events.