Below links are the 1650 Scottish Psalter with brief explanatory notes by Pastor Jeff O’ Neil. 

Book 1	Book 2	Book 3	Book 4	Book 5
Psalm 1	Psalm 42	Psalm 73	Psalm 90	Psalm 107
Psalm 2	Psalm 43	Psalm 74	Psalm 91	Psalm 108
Psalm 3	Psalm 44	Psalm 75	Psalm 92	Psalm 109
Psalm 4	Psalm 45 (I)	Psalm 76	Psalm 93	Psalm 110
Psalm 5	Psalm 45 (II)	Psalm 77	Psalm 94	Psalm 111
Psalm 6 (I)	Psalm 46	Psalm 78	Psalm 95	Psalm 112
Psalm 6 (II)	Psalm 47	Psalm 79	Psalm 96	Psalm 113
Psalm 7	Psalm 48	Psalm 80	Psalm 97	Psalm 114
Psalm 8	Psalm 49	Psalm 81	Psalm 98	Psalm 115
Psalm 9	Psalm 50 (I)	Psalm 82	Psalm 99	Psalm 116
Psalm 10	Psalm 50 (II)	Psalm 83	Psalm 100 (I)	Psalm 117
Psalm 11	Psalm 51	Psalm 84	Psalm 100 (II)	Psalm 118
Psalm 12	Psalm 52	Psalm 85	Psalm 101	Psalm 119:1-8 (1st part)
Psalm 13	Psalm 53	Psalm 86	Psalm 102 (I)	Psalm 119:9-16 (2nd part)
Psalm 14	Psalm 54	Psalm 87	Psalm 102 (II)	Psalm 119:17-24 (3rd part)
Psalm 15	Psalm 55	Psalm 88	Psalm 103	Psalm 119:25-32 (4th part)
Psalm 16	Psalm 56	Psalm 89	Psalm 104	Psalm 119:33-40 (5th part)
Psalm 17	Psalm 57		Psalm 105	Psalm 119:41-48 (6th part)
Psalm 18	Psalm 58		Psalm 106	Psalm 119:49-56 (7th part)
Psalm 19	Psalm 59			Psalm 119:57-64 (8th part)
Psalm 20	Psalm 60			Psalm 119:65-72 (9th part)
Psalm 21	Psalm 61			Psalm 119:73-80 (10th part)
Psalm 22	Psalm 62			Psalm 119:81-88 (11th part)
Psalm 23	Psalm 63			Psalm 119:89-96 (12th part)
Psalm 24	Psalm 64			Psalm 119:97-104 (13th part)
Psalm 25 (I)	Psalm 65			Psalm 119:105-112 (14th part)
Psalm 25 (II)	Psalm 66			Psalm 119:113-120 (15th part)
Psalm 26	Psalm 67 (I)			Psalm 119:121-128 (16th part)
Psalm 27	Psalm 67 (II)			Psalm 119:129-136 (17th part)
Psalm 28	Psalm 68			Psalm 119:137-144 (18th part)
Psalm 29	Psalm 69			Psalm 119:145-152(19th part)
Psalm 30	Psalm 70 (I)			Psalm 119:153-160 (20th part)
Psalm 31	Psalm 70 (II)			Psalm 119:161-168 (21st part)
Psalm 32	Psalm 71			Psalm 119:169-176 (22nd part)
Psalm 33	Psalm 72
Psalm 34
Psalm 35
Psalm 36
Psalm 37
Psalm 38
Psalm 39
Psalm 40
Psalm 41