Choose Directory:
Because there are many different ways to do this, I'll leave this part up to you. Here's some code if you want to use the Common 'Browse for Folder' Dialog window.
To find each image in a directory:
Public Sub LogPictureFilesToDatabase(sFolderPath As String)
Dim sFileName As String
sFileName = Dir(sFolderPath)
Do Until sFileName = ""
Select Case LCase(Right(sFileName, 4))
Case ".jpg", ".gif", ".bmp"
'Put your SQL Insert Statement here
'Or you can use DAO or ADO to add new records instead, if you prefer
'You may also want to use a function to insert a blob if you want to save
'the file inside the database, which I do not recommend
Case Else
'Ignore other file extentions
End Select
sFileName = Dir 'Get next file
Loop
End Sub