Add User Interface to Google Spreadsheet Lookup Script

Hi, I want a for this Google Spreadsheet VLOOKUP script (script source code: [login to view URL]!9NFy1K6a!YvZVvZoc9Kz3HPla2FrqZRdcdFJCwD8XLPJIiYrYQPw ) an UI google script interface. At the moment I have to configure the script by editing source code (documentation here: [login to view URL]!kAUEFIbT!jhaCv5ZlUu4HADkyItSxxOS8VOqc-s41Db7l6kUMB0w). I want a simple user interface which make the script more flexible. The UserInterface should enable the following functions: [login to view URL] : select database source (search google drive or enter document key) [login to view URL] : set how many fields get mapped from database sheet to target sheet 3 function: which columns from database sheet will get mapped/ copied into which columen of target sheet [login to view URL]: if no data is availabe from database display all missing input field on same popup so data input with keyboard will be quicker [login to view URL]: configure by user interface which column in target sheet will get used as lookup value (index)