Not with the extension as it stands, as it only changes the damage processing. The attack functions are a totally different section of code, as the attack would now have to carry a 'string' to hold the 'effect' line type information, which will cause a lot of issues and possible conflicts with other extensions that would also have to carry that extra information around. ( With damage already having its 'string' all the damage function had to pass/process the string anyway, hence it can be carried around the system and extra processed for the extensions. )
Could you do it by changing the 'meta' in the weapon header bar, and adjust the 'base' and just leave the weapon set as 'base' ? ( I know this is probably more a faf as other weapons might be in the list and still need str/dex as base etc.. )
I'll have a think. But at this time, its not possible to influence the attack line in this way.
-pete