If you don't play and record, then your next option is to insert the intro as midi. I suspect you will find adding acutal notation versus tab will work best. Here is a starting point for you for you to start from scratch. Or you can download a midi file and copy and paste the intro.

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BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).