If you could access an original service manual (pdf) those usually have the
chart and images of all the screws, along with the count of each type, plus
the location of where they go. The information may exist in a take-apart or
an iFixit guide where they show specific models, in repair situations.
There also is a MacBook Pro Late 2008 model and some mix up these specs.
The screws may be different and not shared between them, in their locations.
And others misidentify the Late 2008 as a MacBook4.1, of same model #.
See how model numbers (and confusion?) carry across build years as
shown in Everymac.com site, in MacBook information.
The model numbers are not totally definitive of the specific computer you have.
There are other identifiers, such as build model, EMC, and others, since the
main model number usually was shared across several year variables.
If your computer is the MacBook (13-inch, Aluminum, Late 2008) it also was:
Introduced October 2008
Discontinued June 2009
Model Identifier MacBook5,1
Model Number A1278
EMC 2254
Order Number MB466LL/A (2.0 GHz), MB467LL/A (2.4 GHz)
according to http://mactracker.ca database application
•MacBook Unibody (Model A1278) Screw Set - iFixit: (see detail)
https://www.ifixit.com/MacBook-Parts/MacBook-Unibody-Model-No-A1278-Screw-Set/IF 160-021
Usually an authorized trained service specialist would have access to information
and a database of various model service manual in PDF from Apple support. If
nothing else, a specialist independent Apple service provider may be able to match
the correct screws if they had the computer. A repair shop may have a few screws
in their workbench, or some new stock, to check against the MacBook via database.
About Firmware update & RAM:
http://blog.macsales.com/9102-secret-firmware-lets-late-08-macbooks-use-8gb
Hopefully you can match the parts you need and get just those few that match without
having to buy a complete set. If you had an image of where the missing screws go,
and their specification, then matching them may be less difficult at a computer shop.
In any event...
Good luck & happy computing! 🙂
