If the cell contains..., do something

Hi.

1)
How to do the following:
a) If the cell starts with "senior", do something... (eg count that cell if the
cell starts with "senior")
b) If the cell has "March" in the middle, do something...
c) If the cell ends with "boy", do something...
d) If the cell contains the word (it doesn't matter where the word locates), do
something...
??

2) Can you answers in Q1 be used in "conditional formatting"?
I need these conditons to format my cells too!
Thank you!

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Additional information:
- I'm using Office XP
- I'm using Windows XP