If there are search and replace strings you find yourself having to run repeatedly, Pe can remember them so you never have to type them in again. Pull down Window | Preferences | Grep Patterns and add a new search and replace operation (with or without regular expressions).
Give your pattern a memorable name, click Apply, then re-open the Find dialog. To the left of the Find field is a Find button. Click the Find button, and all of your named patterns wil appear on a context menu. Select one, and the pattern you just entered in Preferences will pre-fill the Find and Replace fields.