[DvD-IT]

sorry for my bad english.

Well, here's the question... how can I set a C4 able to destroy vehicles too?

[Wize]

In Red Alert 2 or in Yuri's Revenge. In theory it's simple apply

C4=Yes 
Secondary=Sapper

To your unit (unless it's YR hardcoded, but I doubt that)

~Wize

[DCoder]

Also ensure that the primary weapon cannot attack vehicles (Warhead Verses).

[Renegade]

Explanation:
Sapper is in fact nothing more than a high damage, low range gun that uses the C4 Cursor and sounds and looks like an explosion.

C4=yes enables the unit to blow up buildings.

[Wize]

Tks. Couldn't remember whether C4 had a bearing (didn't think so but meh, why not anyway?) Tks. Renegade

[DvD-IT]

It works! Thanks!