If you’re using a modern enough version of Parchment it should be able to inject the transcript code. I’m pretty sure that includes the 6M62 built in versions of Parchment and Quixe, it’s only older releases that aren’t compatible. I’m not certain though, it’s been a while since I tested it.
Edit: I was almost right. A couple of years back I posted this PSA. The 6M62 version of Quixe works with the transcript injecting, but not the 6M62 version of Parchment. But it is very easy to update Parchment within 6M62. Or you can do as Daniel describes, and modify what the IFComp gives you.
Also, do note that Parchment (but not Quixe) does support Glk stylehints (ie, the Glulx Text Effects extension), and so if your styling can be done with them, it will just work! And that has the advantage of working in other Glulx interpreters too (most of them except for Lectrote).