[Dr. John13]

This is a small video which I made to show how to climb the helicopter in the last mission. It should also work in "The Revenger's Tragedy". If the problem persists in Xbox360 and PS3 then you should try this out. Hope this helps.

For those who have low connections:

Just after Niko jumps from the Motorcycle, press the pause button and go to Keyboard Configuration Option. Click on Custom Mapping and change the configuration of jump button to Up Arrow and the Move forward button to Space. Do your best in tapping. After you get in, reset the configuration and chase Pegorino. Happy gaming.

NO FRAPS OR ANY OTHER PROGRAMS REQUIRED.

Just to be careful, you need to tap the Up arrow rapidly. If you don't then you fall down. I know you don't want to do that sh*tty chase and fail but it is worth.

[PrometheusX]

That's good thinking, great job!

But I don't think you can change the button configuration in the console, can you?

[Dr. John13]

Not sure but Go to Controller Options < Controller Configuration. There should be a option configure the controls.

Thanks.

[Captain_Obvis456]

That never worked for me. Or for most other people. I tried up, down, comma, slash and a whole lot more.
So have a lot of other people.
It's funny, Rockstar doesn't say this works. They don't suggest it.
They do suggest using Fraps though if you call them and ask.